[time] Bulk ordering GPS, radio clock, OCXO units

[David J Taylor]

> I'd give one of those a try if I could find a UK stockist.
> Importing from US would probably push price up to about
> same as the Garmin GPS-18x_LVC I have which gives around
> 1us offset when given a full view of sky but doesn't work
> at all where I'd need it near my server.
[]
> David

David,

I have the GPS18x LVC mounted inside the house, just near the underside of 
a sloping roof, and it sees enough RF there to work well as a GPS server. 
As it happens, I extended the cable to twice the length (a long story):

  http://www.satsignal.eu/ntp/FreeBSD-GPS-PPS.htm#usb

and it still works just fine.  So that would give you a 10m run down to 
the PC, which might be enough.  I would imagine that you could probably 
extend the cable to 20m or 30m without a problem (using shielded cable). 
So pop your GPS unit as high and in the clear as possible (inside the 
house), and run a cable down to the server.

Or, put you GPS as high and clear as possible, and add a small 
Atom-powered PC and a wireless connection to the rest of your network.  It 
would probably still beat your 1ms.  You /can/ get Atom PCs with a serial 
port, but they are less popular than those without.  One example:

  http://www.dabs.com/products/shuttle-mini-itx-intel-atom-1-66ghz-s-l-v-silver-black-5HFX.html

Cheers,
David
-- 
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